From 982c4970fd125cd14b847cb0c7c13bb026673704 Mon Sep 17 00:00:00 2001
From: Felipe Balbi <felipe.balbi@linux.intel.com>
Date: Wed, 24 Aug 2016 14:33:27 +0300
Subject: [PATCH] usb: gadget: udc: core: don't starve DMA resources
commit 23fd537c9508fb6e3b93ddf23982f51afc087781 upstream.
Always unmap all SG entries as required by DMA API
Fixes: a698908d3b3b ("usb: gadget: add generic map/unmap request utilities")
Cc: <stable@vger.kernel.org> # v3.4+
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/gadget/udc/udc-core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/gadget/udc/udc-core.c b/drivers/usb/gadget/udc/udc-core.c
index 89f7cd66f5e6..a6a1678cb927 100644
--- a/drivers/usb/gadget/udc/udc-core.c
+++ b/drivers/usb/gadget/udc/udc-core.c
@@ -97,7 +97,7 @@ void usb_gadget_unmap_request(struct usb_gadget *gadget,
return;
if (req->num_mapped_sgs) {
- dma_unmap_sg(gadget->dev.parent, req->sg, req->num_mapped_sgs,
+ dma_unmap_sg(gadget->dev.parent, req->sg, req->num_sgs,
is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
req->num_mapped_sgs = 0;